Portable fan



FIG. 1 is a rear view of a fan incorporating the new design;

FIG. 2 is a front view of the fan;

FIG. 3 is a right side view of the fan;

FIG. 4 is a left side view of the fan;

FIG. 5 is a top view of the fan; and,

FIG. 6 is a bottom view of the fan. 

CLAIM The ornamental design for a portable fan, as shown. 